a = input().split()
b = []
if a[0] == 'zero':
    b.append('0')
if a[0] == 'one':
    b.append('1')
if a[0] == 'two':
    b.append('2')
if a[0] == 'three':
    b.append('3')
if a[0] == 'four':
    b.append('4')
if a[0] == 'five':
    b.append('5')
if a[0] == 'six':
    b.append('6')
if a[0] == 'seven':
    b.append('7')
if a[0] == 'eight':
    b.append('8')
if a[0] == 'nine':
    b.append('9')

if a[1] == 'zero':
    b.append('0')
if a[1] == 'one':
    b.append('1')
if a[1] == 'two':
    b.append('2')
if a[1] == 'three':
    b.append('3')
if a[1] == 'four':
    b.append('4')
if a[1] == 'five':
    b.append('5')
if a[1] == 'six':
    b.append('6')
if a[1] == 'seven':
    b.append('7')
if a[1] == 'eight':
    b.append('8')
if a[1] == 'nine':
    b.append('9')

if a[2] == 'zero':
    b.append('0')
if a[2] == 'one':
    b.append('1')
if a[2] == 'two':
    b.append('2')
if a[2] == 'three':
    b.append('3')
if a[2] == 'four':
    b.append('4')
if a[2] == 'five':
    b.append('5')
if a[2] == 'six':
    b.append('6')
if a[2] == 'seven':
    b.append('7')
if a[2] == 'eight':
    b.append('8') 
if a[2] == 'nine':
    b.append('9')
print(b)
pr = [101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 307, 311, 313, 317, 331, 337, 347, 349, 353, 359, 367, 373, 379, 383, 389, 397, 401, 409, 419, 421, 431, 433, 439, 443, 449, 457, 461, 463, 467, 479, 487, 491, 499, 503, 509, 521, 523, 541, 547, 557, 563, 569, 571, 577, 587, 593, 599, 601, 607, 613, 617, 619, 631, 641, 643, 647, 653, 659, 661, 673, 677, 683, 691, 701, 709, 719, 727, 733, 739, 743, 751, 757, 761, 769, 773, 787, 797, 809, 811, 821, 823, 827, 829, 839, 853, 857, 859, 863, 877, 881, 883, 887, 907, 911, 919, 929, 937, 941, 947, 953, 967, 971, 977, 983, 991, 997]
y = int(''.join(b))
for i in range(y, y + 30):
    h += 1
    if i in pr:
        print(i)
        break
